Bariatric Wheelchairs

Extra Wide Seats From 20 to 30 Inches, Rated to 700 lb

A bariatric wheelchair is defined by two specifications that must both be met: weight capacity, which is the structural limit of the frame, and seat width, which determines whether the user actually fits. This collection covers 20 to 30 inch seat widths at capacities from 450 lb through 700 lb, primarily from the Drive Sentra and Sentra EC lines with Invacare, Dynarex, Merits and Proactive alternatives.

These two numbers are independent and people routinely conflate them. A frame rated to 700 lb with a 22 inch seat will carry the weight but will compress a wider user at the hips, which causes pressure at the trochanters and makes any extended sitting painful. A 30 inch seat on an under-rated frame is a structural risk. You need to specify both, and you need to measure rather than estimate.

The other thing worth settling early is where the chair has to go. A 30 inch seat produces a chair around 38 inches wide overall. That does not fit through a standard interior door. Measure the doorways before you choose the seat, because a chair that cannot enter the bathroom is not solving the problem it was bought for.

→ Part of Manual Wheelchairs. Compare with Standard Wheelchairs, Lightweight Wheelchairs and Transport Wheelchairs.

Matching Seat Width to Weight Capacity

Measure across the widest point of the seated user's hips and thighs, then add about two inches total for clearance, and separately confirm the frame rating covers the user's weight with a margin. The table below shows how the two specifications pair across this collection.

Overall width figures are approximate and vary by model and armrest style, so confirm the specification on the individual product page. But the pattern holds: every two inches of seat width costs you roughly two inches of doorway clearance.

Sentra Heavy Duty or Sentra EC?

The Drive Sentra line is the backbone of this collection, in two families: Sentra Heavy Duty covering 20 to 24 inch seats at 500 lb, and Sentra EC extra extra wide covering 22 to 30 inch seats at up to 700 lb. Both are offered in every combination of armrest and legrest style, which is why the model numbers look daunting.

Reading the model number

The Sentra codes are systematic. STD is the family, the next two digits are the seat width, EC marks the extra extra wide frame, DDA means detachable desk arm and DFA detachable full arm, and the suffix ELR or SF tells you elevating legrest or swing-away footrest. So STD26ECDDA-ELR is a 26 inch EC frame with detachable desk arms and elevating legrests. Once you know that, the range reads quickly.

Sentra Heavy Duty, 500 lb class

Covers the 20 to 24 inch widths: the STD20DDA-ELR at 20 inch with elevating legrests, the STD22DDA-SF at 22 inch with swing-away footrests, and the STD24DDA-ELR at 24 inch.

Sentra EC, up to 700 lb

The EC frame goes wider and higher. The STD22ECDFA-ELR is rated 450 lb, and the range then steps up through 26 inch, 28 inch and 30 inch, all at 700 lb. Swing-away footrest versions are available at 26 inch and 30 inch.

Reclining, Transport and Alternative Frames

Three configurations exist beyond the standard bariatric chair: reclining backs for users who need to change position without transferring out, bariatric transport chairs for attendant-pushed use, and heavy duty frames from other manufacturers with different geometry.

Reclining bariatric

A reclining back lets the user change their seated angle during the day without transferring out of the chair, which matters for pressure management and for users who spend long periods seated. The Dynarex Bari-Max reclining wheelchair with elevating legrests covers this, alongside the standard Bari-Max HD with elevating legrests.

Bariatric transport chairs

Transport chairs have small rear wheels and are pushed by an attendant rather than self-propelled. They are narrower overall for the same seat width, because there are no large drive wheels and push rims adding width on each side. Available in 20 inch and 22 inch widths. If the user does not self-propel and doorway clearance is tight, this is worth considering before a full wheelchair.

Other heavy duty frames

Invacare's Tracer IV comes in 22 x 18 and 24 x 18 fixed height frames. Proactive's Titus is a K7 bariatric chair. The KN-920 at 20 inch offers adjustable seat height with removable armrests, useful where foot propulsion is a factor.

Compare Bariatric Wheelchairs

Frequently Asked Questions

How do I choose between weight capacity and seat width?

You do not choose between them, you specify both. Weight capacity is the structural limit of the frame and must cover the user's weight with a margin. Seat width determines whether the user fits without hip compression. A high-capacity frame with a narrow seat is uncomfortable and causes pressure at the hips; a wide seat on an under-rated frame is a structural risk. Measure the hips and confirm the weight separately.

How wide is a bariatric wheelchair overall?

Roughly eight inches wider than the seat width, so a 24 inch seat is around 32 inches overall and a 30 inch seat around 38 inches. Standard interior doors will not accommodate the wider chairs. Measure your narrowest doorway, bathroom entry and any corridor turn before ordering, and check the specific overall width on the product page, since it varies with armrest style.

What is the difference between Sentra Heavy Duty and Sentra EC?

Sentra Heavy Duty covers 20 to 24 inch seats at around 500 lb. Sentra EC is the extra extra wide frame, covering 22 to 30 inch seats with the widest models rated to 700 lb. If you need more than a 24 inch seat or more than 500 lb capacity, you need the EC frame.

How do I read Drive Sentra model numbers?

STD is the family, the next two digits are the seat width, EC marks the extra extra wide frame, DDA is detachable desk arm and DFA detachable full arm, and the suffix ELR or SF indicates elevating legrests or swing-away footrests. So STD26ECDDA-ELR reads as a 26 inch EC frame with detachable desk arms and elevating legrests.

Is a bariatric transport chair narrower than a bariatric wheelchair?

Yes, for the same seat width. Transport chairs have small rear wheels and no push rims, so they lose the width those add on each side. If the user does not self-propel and doorway clearance is a constraint, a bariatric transport chair may fit where a full wheelchair will not. The trade-off is that the user cannot move themselves at all and depends entirely on an attendant.

Does a bariatric wheelchair need a bariatric cushion?

Yes. A cushion sized for a standard chair will not span a 24 or 30 inch seat, leaving unsupported edges. Beyond width, bariatric users are frequently at elevated pressure injury risk, so cushion selection should follow a clinical assessment rather than being treated as a comfort accessory. See Wheelchair Cushions.

What does K7 mean on a bariatric wheelchair?

K0007 is the HCPCS billing category used in the United States for heavy duty manual wheelchairs, generally covering higher capacity and wider seat configurations. Each K-code has its own coverage criteria and documentation requirements set by the payer, typically including documentation of why lower-category equipment is insufficient. Confirm the code with the prescribing clinician if reimbursement is part of the plan.

Are elevating legrests recommended on bariatric chairs?

They are frequently specified, since lower limb oedema is common in this population and elevation assists venous return. But they should follow a clinical reason rather than a default, because elevating legrests add weight to a chair that is already heavy and add length that makes an already wide chair harder to manoeuvre in a home. If there is no elevation requirement, swing-away footrests are easier to live with.

How heavy is a bariatric wheelchair itself?

Substantially heavier than a standard chair, since the frame is reinforced and the components are scaled up. That matters for anyone who has to lift the chair into a vehicle or move it without the user in it. If transport is a regular requirement, factor the empty chair weight into the decision and consider whether a transport model or vehicle ramp is part of the solution.

Is a bariatric wheelchair covered by insurance?

Bariatric wheelchairs may be covered as durable medical equipment when medical necessity criteria are met and documented by the prescribing clinician, usually including documentation of why standard equipment is insufficient. Requirements and category thresholds are set by the payer. Our Medicare Part B coverage guide is a starting point, and the clinician's documentation determines the outcome.

MediDepot Purchasing Advantages

• Price Match Guarantee: found the same model and configuration for less elsewhere? We will match the verified price.
• Equipment Financing: bariatric equipment carries a higher unit cost, financing spreads it across the year.
• Extended Warranty: coverage on frames and components working near their rated load.
• Military Discount: available for qualifying military personnel, veterans and facilities.
• Request a Quote: seat width and capacity matching, doorway clearance checks and cushion pairing.

Related Buying Guides

• Manual Wheelchair Sizing Guide
• Manual vs Electric Power Wheelchairs
• 2026 Guide to Buying Mobility Aids
• Medicare Part B Coverage for Mobility Aids
• Sit-to-Stand vs Hoyer Lift: Safety and Staffing

Browse Related Collections

• All Manual Wheelchairs
• Standard Wheelchairs
• Lightweight Wheelchairs
• Transport Wheelchairs
• Power & Electric Wheelchairs
• Wheelchair Cushions
• Wheelchair Accessories
• Bariatric Beds
• Patient Lifts & Transfer Systems
• All Mobility Aids